[PATCH 1/2] iio: Move callback buffer to its own module

[Lars-Peter Clausen <lars@metafoo.de>]

Currently the IIO callback buffer implementation is directly built into the
IIO core module when enabled. Given that the callback buffer module is
standalone functionallity there is really no reason to do this. So move it
to its own module.

Also rename the source to follow the standard IIO module naming convention
as well as add a license notice to the file.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
---
 drivers/iio/Kconfig                                   |  2 +-
 drivers/iio/Makefile                                  |  2 +-
 drivers/iio/{buffer_cb.c => industrialio-buffer-cb.c} | 12 ++++++++++++
 3 files changed, 14 insertions(+), 2 deletions(-)
 rename drivers/iio/{buffer_cb.c => industrialio-buffer-cb.c} (89%)

diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
index 4011eff..b52c8a3 100644
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@@ -21,7 +21,7 @@ config IIO_BUFFER
 if IIO_BUFFER
 
 config IIO_BUFFER_CB
-	bool "IIO callback buffer used for push in-kernel interfaces"
+	tristate "IIO callback buffer used for push in-kernel interfaces"
 	help
 	  Should be selected by any drivers that do in-kernel push
 	  usage.  That is, those where the data is pushed to the consumer.
diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
index 698afc2..09d8ec5 100644
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@@ -6,8 +6,8 @@ obj-$(CONFIG_IIO) += industrialio.o
 industrialio-y := industrialio-core.o industrialio-event.o inkern.o
 industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
 industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o
-industrialio-$(CONFIG_IIO_BUFFER_CB) += buffer_cb.o
 
+obj-$(CONFIG_IIO_BUFFER_CB) += industrialio-buffer-cb.o
 obj-$(CONFIG_IIO_TRIGGERED_BUFFER) += industrialio-triggered-buffer.o
 obj-$(CONFIG_IIO_KFIFO_BUF) += kfifo_buf.o
 
diff --git a/drivers/iio/buffer_cb.c b/drivers/iio/industrialio-buffer-cb.c
similarity index 89%
rename from drivers/iio/buffer_cb.c
rename to drivers/iio/industrialio-buffer-cb.c
index 1648e6e..323079c 100644
--- a/drivers/iio/buffer_cb.c
+++ b/drivers/iio/industrialio-buffer-cb.c
@@ -1,4 +1,12 @@
+/* The industrial I/O callback buffer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/export.h>
@@ -124,3 +132,7 @@ struct iio_channel
 	return cb_buffer->channels;
 }
 EXPORT_SYMBOL_GPL(iio_channel_cb_get_channels);
+
+MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
+MODULE_DESCRIPTION("Industrial I/O callback buffer");
+MODULE_LICENSE("GPL");
-- 
2.1.4